Clinical trials

The goal of this pilot prospective study is to evaluate the effect of tDCS on psychotic-like symptoms in patients with Lewy Body Dementia (LBD). The main questions it aims to answer are: * What is the effect of tDCS on neuropsychiatric symptoms, especially psychotic-like symptoms? * What is the impact of tDCS on caregiver burden? Researchers will compare active tDCS (2mA stimulation, anode on the left dorsolateral prefrontal cortex, cathode on the right fronto-orbital) to Sham tDCS (placebo stimulation, no intensity applied) to see if there is an effect on reducing psychotic-like symptoms and on caregiver burden. Participants will: * Undergo a stimulation phase consisting of 10 tDCS sessions of 20 minutes each, spread over 2 consecutive weeks (5 days with stimulation, 2 days without stimulation, 5 days with stimulation). * perform assessments at T0 (inclusion), T1 (at the end of the stimulation phase), and T2 (follow-up at 8 weeks post stimulation).

This study aims to study, in patient with Parkinson's disease, mild to moderate stage (according to Movement Disorder Society Clinical Diagnostic Criteria for Parkinson's Disease, Postuma et al., 2015): * the evolution of oculomotricity markers over time. * the correlation between neurological evaluations (motor and non-motor scores), neuropsychological evaluations (cognitive disorders) and oculomotricity evaluation, over a follow-up period of 7 years. * the impact of antiparkinsonian drugs on the evolution of oculomotricity assessment by video-oculography. * the value of oculomotricity assessment by video-oculography as an evolutionary marker of the disease.